\\[-1.8ex] Soil Heterogeneity & $-$0.891$^{***}$ & $-$0.890$^{***}$ & $-$0.737$^{***}$ & $-$0.741$^{***}$ & $-$0.726$^{***}$ & $-$0.638$^{***}$ & $-$0.155 \\ 
  & (0.304) & (0.303) & (0.267) & (0.250) & (0.232) & (0.226) & (0.188) \\ 
  & & & & & & & \\ 
 Share Using Fertilizer$_{t-1}$ &  &  &  &  &  &  & $-$2.602$^{***}$ \\ 
  &  &  &  &  &  &  & (0.146) \\ 
  & & & & & & & \\ 
\\[-1.8ex] 
Observations & 8,983 & 8,983 & 8,983 & 8,983 & 8,983 & 8,971 & 8,971 \\ 
R$^{2}$ & 0.002 & 0.003 & 0.069 & 0.102 & 0.107 & 0.113 & 0.158 \\ 
